You can only have one master device per Modbus.
If both Modbus channels are occupied, there is no other solution.
In a year I will get a Ecoforest EcoGeo heat pump. I would like to control it with HA, but let the heat pump control the output temperature itself (like it can do when you add temperature sensors.) Do you know if it is possible to emulate those sensors with the modbus (so I can use any sensor via HA)?
Or would it be sufficient to use the on/off inputs per zone and let the heat pump figure out the temperature without any indoor temperature sensors?
I would probably be able to figure it out by myself if I knew all the modbus registers. But I canât find any information about them. Where did you get the information about the registers that you used?
Kind regards,
Jurian Zwaan
I got this list from the importer in The Netherlands.
For reading the unit I use the BMS2 channel which is in read-only mode at this time for monitoring only.
BMSAddress
1 Brine temp. Out R Analog
2 Brine temp. In R Analog
3 Heating temp. Out R Analog
4 Heating temp. In R Analog
5 Compressor suction temperature R Analog
6 Compresor suction pressure R Analog
7 Compressor discharge pressure R Analog
8 DHW temperature R Analog
11 Outdoor temperature R Analog
13 Brine circuit pressure R Analog
14 Heating circuit pressure R Analog
29 Brine temp. Air Unit outlet R Analog
30 COP R Analog
31 PF R Analog
94 Condensation temperature R Analog
132 Superheat R Analog
133 Expansion valve position % R Analog
134 BUS DHW Setpoint R/W Analog
135 BUS Heating DG1 Setpoint R/W Analog
136 BUS Heating SG2 Setpoint R/W Analog
137 BUS Heating SG3 Setpoint R/W Analog
138 BUS Heating SG4 Setpoint R/W Analog
139 BUS Cooling DG1 Setpoint R/W Analog
140 BUS Cooling SG2 Setpoint R/W Analog
141 BUS Cooling SG3 Setpoint R/W Analog
142 BUS Cooling SG4 Setpoint R/W Analog
143 BUS Pool Setpoint R/W Analog
194 Supply temperature SG2 R Analog
195 Supply temperature SG3 R Analog
196 Supply temperature SG4 R Analog
198 Start temperature for DHW R Analog
199 Evaporation temperature R Analog
200 Heating buffer tank temperature R Analog
201 Cooling buffer tank temperature R Analog
202 EER R Analog
203 Compresor discharge temperature R Analog
1 Compressor RPM R Integer
3 Scroll Temp. R Integer
4 Inverter temperature R Integer
79 Working Hours L R Integer
80 Working Hours H R Integer
81 Power consumption R Integer
82 Condensation capacity R Integer
92 CURRENT_HOUR R Integer
93 CURRENT_MINUTE R Integer
94 CURRENT_DAY R Integer
95 CURRENT_MONTH R Integer
96 CURRENT_YEAR R Integer
143 Condensation energy January R Integer
144 Condensation energy February R Integer
145 Condensation energy March R Integer
146 Condensation energy April R Integer
147 Condensation energy may R Integer
148 Condensation energy June R Integer
149 Condensation energy July R Integer
150 Condensation energy August R Integer
151 Condensation energy September R Integer
152 Condensation energy October R Integer
153 Condensation energy November R Integer
154 Condensation energy December R Integer
155 Evaporation energy January R Integer
156 Evaporation energy February R Integer
157 Evaporation energy March R Integer
158 Evaporation energy April R Integer
159 Evaporation energy may R Integer
160 Evaporation energy June R Integer
161 Evaporation energy July R Integer
162 Evaporation energy August R Integer
163 Evaporation energy September R Integer
164 Evaporation energy October R Integer
165 Evaporation energy November R Integer
166 Evaporation energy December R Integer
167 Electrical consumption January R Integer
168 Electrical consumption February R Integer
169 Electrical consumption March R Integer
170 Electrical consumption April R Integer
171 Electrical consumption may R Integer
172 Electrical consumption June R Integer
173 Electrical consumption July R Integer
174 Electrical consumption August R Integer
175 Electrical consumption September R Integer
176 Electrical consumption October R Integer
177 Electrical consumption November R Integer
178 Electrical consumption December R Integer
184 Evaporation capacity R Integer
220 Working program by BUS R/W Integer
221 BUS DHW Demand R/W Integer
222 BUS Pool Demand R/W Integer
223 BUS DG1 Demand R/W Integer
224 BUS SG2 Demand R/W Integer
225 BUS SG3 Demand R/W Integer
226 BUS SG4 Demand R/W Integer
280 Number of Starts L R Integer
281 Number of Starts H R Integer
284 Software version 1 R Integer
285 Software version 2 R Integer
286 Software version 3 R Integer
50 Alarm: 1= No alarm; 0=Active alarm R Boolean
53 on/off control by BUS R/W Boolean
127 Summer R Boolean
128 Winter R Boolean
I: Integer -->Register
A: Analog--> Register/10
B Boolean -->Coil
Data types
Integer BMS address+5001 (Protocol: MB Extended)
I use on/off control for heating and cooling. Stepped off from the TH Therm units because this limited me to one sensor per group on the heatpump.
With on/off control I can control a group to turn on independently on a zone that requests heat or cool.
Do you mean th-tune? And if so, do you have any information about the modbus registers of that device?
And how does the heat pump determine the output temperature when you use on/off, only the outside temperature?
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As mentioned I am using only on/off for heating and cooling.
The water temperature is determined by the outside temperature.
TH-tune is the right name. I removed this way of control because it is an expensive device with limitations for the way I wanted to control the zones.
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Hi NielsS,
Will have an Ecoforest 5-22 KW water heatpump installed after summer. The installer is recommending an expensive thermostat from which I think will be the Th-TuneâŠ
Could you please confirm the logic below for controlling this:
Reading the installation manual I think I can just use input signals for heating/cooling through the J4 connector. Is that how you did it?
The manifold will have 1 actuator per valve which are controlled via home assistant via room-thermostats. When one of the thermostats deviates x value from target the actuator valve is opened and a signal is given through the J4 port to switch on the heat pump?
Regards Bart
I am not sure what you mean with J4 (too long time ago and not having the manual around)
I ditched the expensive TH Tune and replaced it with a zonecontroller that measures temperature and humidity per room.
Inputs for heat and cool are respectively:
Group Heat Cool
DG1 DI5 DI6
SG2 DI7 DI8
SG3 DI9 DI10
SG4 DI11 DI12
These inputs are simple on/off channels. There is a 24 volt and a input. If you connect these together, the group will be active then. Heat goes before cooling and hot water request is always overruling.
I am using SG3 and SG4 for 2 different groups (2 buildings)
My zonecontroller measures every room independently. If there is heat or cool request, the zone opens and after one minute the SG3 or SG4 group will be enabled for heating or cooling.
Which zone controller do you use @NielsS? When using Google I only find two mentions of the word zonecontroller in the manually. But canât find any related device.
I have looked at Tech and Honeywell and both did not meet my expectations.
Integrating in HA was not possible at that time or was a too expensive system.
So I built one on a ESP32 to have a 8 channel heat and cool zone controller with temperature and humidity sensors. This unit can run standalone with a built in webserver and also connects with a REST-API interface and MQTT.
I am new to HA, but are looking for an alternative to the thTouch. Iâm looking for two options, that I cannot get to work:
- anticipating low and high electricity prices (APX, using tibber)
- setting a slightly lower night temp (ânacht verlagingâ)
Any help how to do this through HA sould be very much appreciated! Can it be done with a Protoss PE11 or is more needed?
I have an ecogeo c3-12kw. My idea is to use this integration to monitorize the machine and also to fully shutdown/power on when I go holidays. Is it possible with this?. @NielsS pointed this should be read only, but at the same time he talks about he uses it to off certain groups. Also the addresses from the first list and the one he received from Netherland importer are different. I know, I didnât understand anything 
For the BMS adresses, just add 5001 to the number it has in the list. Example: if the list shows 2 as adress, the true address is 5002 (to make it difficult). Maybe they have changed the list to the true address for conventience. (also I have an older model that was released in 2018 and this have an older firmware/controller)
If you enable the full control by BMS, be aware that all the control needs to be via the BMS port. For example: cooling and heating per channel is then demanded via modbus only. External inputs for heat, cool, dhw and other controls do not work.
This is a personally designed pcb with dito software.
It is not yet publicly released due to some small issues in the pcb design.
Is there any way that I can power off/power on it remotely and in a safer way? Without disconnecting power meanwhile the compressor running.
There are external inputs which prohibit turning on the compressor. You can use these inputs for this feature.
The installation manual has these inputs described.
Thanks for your feedback and all the information provided in this thread. Really appreciated.
My concern with this is itâs not very âclean wayâ, I mean, inhibit powering the compressor sounds too messy and probably associated to rise other alarms in the systems. Itâs also true that it doesnât appear mapped in your list any address to power on/off the machine⊠so wouldnât be a possibility although at anytime write would be enabled in the future.
By the way, how do you go with enabling write mode with BMS?.
Regards,
The external controls inputs are part of the internal control unit. Using these inputs does not break the compressor.
The list of inputs:
| Description | Signal | Type | Connector |
|---|---|---|---|
| Control of electrical consumption (EVU) | Digital input | Voltage-free (0V) | DI1 |
| WINTER / SUMMER program selection | Digital input | Voltage-free (0V) | DI2 |
| Enable / disable DHW production | Digital input | Voltage-free (0V) | DI3 |
| Pool production | Digital input | Voltage-free (0V) | DI4 |
I did not enable the BMS external control due to limitations. The heatpump does not respond to other external thermostats when BMS external control is enabled.
Wow. This part "âheatpump does not respond to other external thermostats when BMS external control is enabledâ has put me off from integrating my EcoGeo heatpump.
Anyhow, I may try monitoring just to play around with modbus on esphome, has anyone tried this instead of fancy hardware converters?
